Window-lock.



W M. MANNING.

WINDOW LOCK.

APPLICATION men MAR. 6. 1915.

Patented May 22, 1917.

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pnirnn @TATES tarrnnr @FFTQE WILLIAM M. MANNING, or SEATTLE, WASHINGTON.

WINDOW-LOOK.

Application filed March 6, 1915.

To all whom it may concern:

Be it known that I, VVILLIAM M. MAN- NING, a citizen of the United States, and a resident of Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in VVin- (low-Locks, of which the following is a full, true, and exact specification.

My invention relates to window locks and has for its principal object; to provide a cheap and simple device, which is easily attachable to a window sash and frame and by means of which both top and bottom sashes of a window may be locked in any desired position with relation to each other and the frame. A further object is to provide a device of the above generally described character in which the forced release of the holding means of one sash will not release the other sash.

Other objects will appear as my invention is more fully explained in the following specification, illustrated in the accompanying drawings and pointed out in the appended claim.

In the drawings, Figure 1 is a plan view of my device shown attached to a fragment of a window. Fig. 2 is an elevation of Fig. lwith parts broken away. Fig, 3 is an enlarged plan view of my device with parts broken away.

Referring more particularly to the drawings, numeral 1 designates an outer casing which may preferably be stamped from a single piece of material. Outer casing 1 is provided with reinforcing and fastening flanges 2 which are drilled as at 3 to receive fastening screws 4. One side of the outer casing 1 is cut away as at 5 to allow space for a thumb latch 6. Adjacent to opening 5 is a finger projection 5 A bell crank lever 7 is, pivoted at 8 and has arms 9 and 10 and the thumb latch 6, all of which are integral with the said lever. Bolts 11 and 12, which are located at right angles to each other, pass through openings in the outer casing 1. The bolts 11 and 12 are shouldered as at 11 and 12 respectively, and have their inner ends slotted as at 13 and 14 respectively. Bolts 11 and 12 are'slidably secured to arms 9 and 10 respectively, by pins 9" and 10 respectively. Springs 15 and 16 hold bolts 11 and 12 respectively, normally in position shown. The springs'are held in place bya post 17 which is secured to outer casing 1.

It Wil be noted that the forc ng back of Specification of Letters Patent.

Patented May 22, 1917.

Serial No. 12,536. r

either bolt 11 or 12 does not in any way cause a movement of the other bolt due to the slotted connections of the bolts and their arms 9 and 10, and to the fact that they are yieldingly held in place by springs 15 and 16 respectively. The device is mounted on the top of the bottom sash 18 of a window and adjacent to the window frame 19. The device is so located that the bolts 11 and 12 will normally engage toothed racks 20 and 21 respectively, the former being secured to the inner side of the upper sash 22 and the latter in a groove 23 in the frame 19. The racks are preferably made of sheet metal, formed as shown by an approved cramping device. When it is desired to release the lock, the thumb latch 6 is pushed toward the finger projection 5 which operates the bell crank lever so as to withdraw the bolts 11 and 12 from engagement with their respective racks. Either or both sashes may now be moved as desired. Upon the release of the thumb latch 6, the bolts 11 and 12 are again shot out to engagement with their respective racks 20 and 21, in which position they hold both sashes 18 and 22 securely in place.

It is apparent from the above description that my window lock is adapted to hold both sashes of a window, either in a closed position or in a partly open position with relation to each other and their frame and further that the sashes are at all times nor mally locked in the positions as set. With my device, it is possible to have a window partly open at the top or bottom or both and at the same time to have the window locked from the inside against further opening or closing.

\Vhile I have shown a particular form of embodiment of my invention, I am aware that many minor changes therein, will readily. suggest themselves to others skilled in 'the art without departing from the spirit a slot in its inner portion, the outer end of each bolt being reduced to form a shoulder, the reduced ends extending through openings in the casing and the shoulders limiting the outward movement of said bolts, pivots extending through the slots in the bolts to connect same with right angle portions of the T-shape lever, springs mounted on a post in the casing, one of said springs engaging behind one of the bolts to normally project it outwardly, the other said spring engaging in a groove formed in the companion bolt to normally project same outwardly, and a finger piece extending from' the casing in spaced relation to the 15 thumb piece, whereby when the thumb and I WILLIAM M. MANNING. Witnesses R. D. SMALLEY, WINIFRED KNOPH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. I 

